:root {
    --admin-bg: #111827;
    --admin-panel: #172033;
    --admin-panel-soft: #1f2b44;
    --admin-line: rgba(255, 255, 255, 0.1);
    --admin-text: #edf2ff;
    --admin-muted: #aab8d1;
    --admin-accent: #f97316;
    --admin-accent-dark: #c2410c;
    --admin-ok: #22c55e;
    --admin-danger: #ef4444;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--admin-text);
    background:
        radial-gradient(circle at top left, rgba(249, 115, 22, 0.22), transparent 20%),
        radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.16), transparent 20%),
        var(--admin-bg);
}

a {
    color: inherit;
    text-decoration: none;
}

.admin-shell {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

.admin-sidebar {
    padding: 24px;
    border-right: 1px solid var(--admin-line);
    background: rgba(11, 18, 32, 0.7);
    backdrop-filter: blur(18px);
    display: grid;
    align-content: start;
    gap: 24px;
}

.admin-brand {
    display: grid;
    gap: 4px;
    font-weight: 800;
}

.admin-brand small,
.admin-page-head p,
.stat-card span {
    color: var(--admin-muted);
}

.admin-nav {
    display: grid;
    gap: 8px;
}

.admin-nav a,
.logout-form button,
.admin-button {
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid transparent;
    font: inherit;
}

.admin-nav a {
    background: rgba(255, 255, 255, 0.04);
}

.logout-form button,
.admin-button {
    cursor: pointer;
    background: linear-gradient(135deg, var(--admin-accent), var(--admin-accent-dark));
    color: #fff;
    border: none;
}

.admin-button.secondary {
    background: transparent;
    border: 1px solid var(--admin-line);
}

.admin-main {
    padding: 28px;
}

.admin-page,
.narrow-page {
    display: grid;
    gap: 20px;
}

.narrow-page {
    max-width: 560px;
}

.admin-page-head,
.card-head,
.table-actions,
.field-row,
.admin-actions,
.stats-grid,
.admin-grid {
    display: flex;
    gap: 16px;
}

.admin-page-head,
.card-head {
    justify-content: space-between;
    align-items: center;
}

.stats-grid,
.admin-grid {
    flex-wrap: wrap;
}

.stat-card,
.admin-card,
.comment-card {
    background: rgba(23, 32, 51, 0.88);
    border: 1px solid var(--admin-line);
    border-radius: 22px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.18);
}

.stat-card {
    min-width: 180px;
    padding: 18px;
    display: grid;
    gap: 8px;
}

.stat-card strong {
    font-size: 1.8rem;
}

.admin-card {
    flex: 1 1 420px;
    padding: 20px;
}

.admin-form,
.inline-form {
    display: grid;
    gap: 14px;
}

.inline-form {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 10px;
}

label,
fieldset {
    display: grid;
    gap: 8px;
}

fieldset {
    border: 1px solid var(--admin-line);
    border-radius: 16px;
    padding: 14px;
}

input,
textarea,
select,
button {
    font: inherit;
}

input,
textarea,
select {
    width: 100%;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid var(--admin-line);
    background: rgba(255, 255, 255, 0.04);
    color: var(--admin-text);
}

textarea {
    resize: vertical;
}

.table-wrap {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    border-bottom: 1px solid var(--admin-line);
    padding: 12px;
    text-align: left;
    vertical-align: top;
}

.table-actions {
    flex-wrap: wrap;
}

.table-actions form {
    margin: 0;
}

.checkbox-grid {
    display: grid;
    gap: 8px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-item.depth-1 {
    margin-left: 16px;
}

.checkbox-item.depth-2 {
    margin-left: 32px;
}

.comment-card {
    padding: 16px;
}

.comment-card-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.category-admin-tree ul {
    list-style: none;
    padding-left: 16px;
}

.category-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.alert {
    padding: 14px 16px;
    border-radius: 16px;
}

.alert-error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.24);
}

@media (max-width: 980px) {
    .admin-shell {
        grid-template-columns: 1fr;
    }

    .admin-sidebar {
        border-right: none;
        border-bottom: 1px solid var(--admin-line);
    }
}

@media (max-width: 720px) {
    .admin-main {
        padding: 18px;
    }

    .inline-form {
        grid-template-columns: 1fr;
    }
}